Specific code 2014 ICD-9-CM Diagnosis Code 610.4
Mammary duct ectasia
  • Billable Code
  • ICD-9-CM 610.4 will be replaced by an equivalent ICD-10-CM code (or codes) when the United States transitions from ICD-9-CM to ICD-10-CM on October 1, 2015.
  • ICD-9-CM 610.4 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
Disease Synonyms
  • Left mammary duct ectasia
  • Right mammary duct ectasia
Clinical Information
  • Dilatation of the lumen of the mammary ducts without evidence of epithelial atypia.
  • Dilatation of the mammary duct without atypical cells.
Applies To
  • Comedomastitis
  • Duct ectasia
  • Mastitis:
    • periductal
    • plasma cell
Convert to ICD-10-CM: 610.4 converts approximately to:
  • 2014 ICD-10-CM N60.49 Mammary duct ectasia of unspecified breast
ICD-9-CM Volume 2 Index entries containing back-references to 610.4:
  • Comedomastitis 610.4
  • Cyst (mucus) (retention) (serous) (simple)
    • breast (benign) (blue dome) (pedunculated) (solitary) (traumatic) 610.0
      • involution 610.4
      • sebaceous 610.8
  • Dilatation
    • duct, mammary 610.4
    • mammary duct 610.4
  • Ectasia, ectasis
    • breast 610.4
    • duct (mammary) 610.4
    • mammary duct (gland) 610.4
  • Mastitis (acute) (adolescent) (diffuse) (interstitial) (lobular) (nonpuerperal) (nonsuppurative) (parenchymatous) (phlegmonous) (simple) (subacute) (suppurative) 611.0
    • periductal 610.4
    • plasma cell 610.4
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 610.4 is one of thousands of ICD-9-CM codes used in healthcare. Although ICD-9-CM and CPT codes are largely numeric, they differ in that CPT codes describe medical procedures and services. Can't find a code? Start at the root of ICD-9-CM, check the 2014 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.